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image: Image of the Day: Monkey Business

Image of the Day: Monkey Business

By | January 11, 2017

For the first time, researchers have documented interspecies sexual behavior between a male Japanese macaque and a female sika deer.

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image: Guppie Porn

Guppie Porn

By | August 1, 2016

Biologist Carin Bondar delivers a TED talk about the wilder side of sex.

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image: Ancient Sex

Ancient Sex

By | October 19, 2014

Fossils of an extinct, armored fish challenge current understanding of when copulation and internal fertilization evolved in jawed vertebrates.

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image: A Rock and a Hard Place

A Rock and a Hard Place

By | July 1, 2014

Meet the retired chemical engineer who has made quite the impression on paleoentomology by uncovering ancient secrets of insect coitus.

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image: Geni-Tales

Geni-Tales

By | July 1, 2014

Penises and vaginas are not just simple sperm delivery and reception organs. They have been perfected by eons of sexual conflict.  

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image: Imaging Intercourse, 1493

Imaging Intercourse, 1493

By | July 1, 2014

For centuries, scientists have been trying to understand the mechanics of human intercourse. MRI technology made it possible for them to get an inside view.

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image: Sex in a Scanner

Sex in a Scanner

By | July 1, 2014

Meet Pek Van Andel, who conducted the famous MRI sex experiment, and see his research in action.

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image: Size Matters

Size Matters

By | July 1, 2014

The disproportionately endowed carabid beetle reveals that the size of female—and not just male—genitalia influences insemination success.

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image: Slippery Passion

Slippery Passion

By | July 1, 2014

Observe the sinuous sensuality of mating brook lampreys (Lampetra planeri).

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image: Speaking of Sex

Speaking of Sex

By | July 1, 2014

July 2014's selection of notable quotes

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